在投射性镜像对称声学元材料中观察Z2非赫密特皮肤效应
Tingzhi Liu1, Yuzeng Li1, Qicheng Zhang1
1Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan, 430072, China.
Advanced materials (Deerfield Beach, Fla.)
|July 3, 2025
概括
在使用投射镜对称的无旋系统中,证明了一种新的Z2非赫米蒂安皮肤效应 (NHSE). 这种以对称性丰富的NHSE在声学元材料中实验观察到,使新的波动操纵可能性成为可能.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 拓物理学的物理.
- 声学超材料是一种声学超材料.
背景情况:
- 非赫米特皮肤效应 (NHSE) 描述了网格边界的固态局部化.
- NHSE源于复杂的能量波段的点间隔拓.
- 对称性可以丰富NHSE,随着时间逆转对称性保护Z2NHSE.
研究的目的:
- 提出一个1D双层模型,在无旋转系统中展示Z2 NHSE.
- 通过投射镜对称来实现Z2 NHSE.
- 在声学元材料中实验验证Z2 NHSE.
主要方法:
- 一个1D双层非赫米蒂安格子模型的开发.
- 投射镜对称性的实施.
- 使用带有积极反回路的声学超材料进行实验实现,用于增益和损失.
主要成果:
- 在无旋转系统中展示Z2 NHSE.
- 通过实验观察均和双向Z2 NHSE.
- 使用主动反成功实施收益和损失.
结论:
- 投射镜对称性使Z2 NHSE在无旋转系统中成为可能.
- 用声学超材料进行实验验证证证了理论预测.
- 这些发现为探索对称性丰富的拓现象和波浪操纵开辟了道路.
相关概念视频
01:16Properties of the z-Transform II
188
The property of Accumulation in signal processing is derived by analyzing the accumulated sum of a discrete-time signal and using the time-shifting property to determine its z-transform. This principle reveals that the z-transform of the summed signal is related to the z-transform of the original signal by a multiplicative factor.
Moreover, the convolution property indicates that the convolution of two signals in the time domain corresponds to the product of their z-transforms in the frequency...
Moreover, the convolution property indicates that the convolution of two signals in the time domain corresponds to the product of their z-transforms in the frequency...
188
01:17Properties of the z-Transform I
317
The z-transform is a fundamental tool in digital signal processing, enabling the analysis of discrete-time systems through its various properties. It is an invaluable tool for analyzing discrete-time systems, offering a range of properties that simplify complex signal manipulations. One fundamental property is linearity. For any two discrete-time signals, the z-transform of their linear combination equals the same linear combination of their individual z-transforms. This property is essential...
317